I don't know rabbit foot acacia. Some fold leaves up when they get too hot or dry. It is a way to conserve moisture. Try some different positions and see what happens.
Looks fine and healthy. I had a rabbits foot I just got rid of this year to make room on the benches. Mine sat in full sun and never missed a beat. Yours looks good, keep doing what your doing.
I checked. This is an African species. Grows where it gets real hot and real dry for part of the year. It makes sense they have developed the ability to fold up leaves in the hotter parts of the day to help keep cool and conserve water so I think that behaviour is probably normal.